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@EGBGB T'. HART, @F NEWARK, NEW JERSEY.

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Specieation forming part of Letters Patent No. llc'lh, dated November 9, 1875 application filed May 5, 1875.

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'and useful Improvements in -Metallic Gartridge-Shells; and I ld'0 hereby declare that the following specification, taken in connection with the drawings furnished, is a full, clear, and exact description thereof, s ucient to enable others skilled in the art to make and use the same.

My invention consists of certain improvements in the construction and mode of securing in position that part of a cartridge-shell which forms the base or breech 'piece in which the batterycup is formed, having for its obcheapness of construction, and such as to enable me todispense with the usual numberof parts as formerly employed. y

Referring to the drawings, in which Figure 1 represents a section of a shell and its basepiece in position with shallow battery-cup. Fig. 2 represents same. invention with the ordinary battery-cup, provided with an anvil or nipple. Figs. 3 and 4 represent the Berdan style of battery-cup, (sectional,) of the usualv manufacture, with re-enforced back, exhibiting v the weakened parts of the battery-cup, &c.

To enable others skilled in the art to make and practice my invention,.I will describe it more fully in detail.

The cylindrical part of 'the shell is constructed in nearly the usual form, and of suitable metal, with an inverted flange at. one end, extending inwardly about one-eighth of an inch toward its center of diameter, there by forming a stiff rim suitable to be embraced by the edges of the base-piece, which, when v riveted, or closed over the edge of said rim,

as shown in Figs. 1 and 2, form lips of sufficient strength to hold the parts together without the aid of other pieces or means. This base-piece may be formed by any of the known methods by which such work is or may be accomplished, although I generally form those with shallow battery-cups in dies, drilling the hole for the fulminate or fire-passage, while those in which anvils are employed may be formed in the same manner, with the exceptions of the battery-cup, which may be more conveniently drilled in consequence of its depth and limited diameter. y

As the drawings fully illustrate my improvement, further description would appear superfluous and unnecessary.

I am aware that metallic cartridge-shells with breech-blocks or base-pieces formed separately have been made heretofore in great varieties, yet for the most part complicated.

and difficult to properly construct. Even iu their simplest form ofy construction. the manner of uniting the parts together, particularly when solder is employed, proved defective `and liable` to soon get out of orden-WTO oby viate these objections and diiiicultes, and for the purpose of producing a cartridge-shell with a base-piece of a desired or proper thickness in the fewest number of parts and in the simplest form, is my purpose.

I am aware that rubber cartridge-cases have been provided with metallicvents to prevent the enlargement at this point that would otherlwise occur in iiring, &c. I am also aware that c'aps provided with an annular tongue or groove for insertion into the base of a shell have been in use prior tormy saidA invention. Therefore, these I do not claim.

Having` thus set forth 4my invention, what I claim as' new, and desire to secure by Letters Patent of the United States of America, 1s

A metallic cartridge-shell with a thickened vbreech-piece, constructed substantially as described, uniting with the inverted liange of the cylinder at its base, substantially in the manner and for the purposes setforthi 'In testimony that I claim the foregoing I have lhereunto subscribed my name before two subscribing witnesses on this 2d day ol April, A. D. 1875.

GEORGE E. HART.

Witnesses:

JOHN DANE, Jr., S. E. HART. 

